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427 lines
8.5 KiB
C
427 lines
8.5 KiB
C
/***********************************************************
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Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The
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Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* POSIX module implementation */
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#include <signal.h>
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#include <string.h>
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#include <setjmp.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#ifdef SYSV
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#include <dirent.h>
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#define direct dirent
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#else
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#include <sys/dir.h>
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#endif
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#include "allobjects.h"
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#include "modsupport.h"
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extern char *strerror PROTO((int));
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#ifdef AMOEBA
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#define NO_LSTAT
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#endif
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/* Return a dictionary corresponding to the POSIX environment table */
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extern char **environ;
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static object *
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convertenviron()
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{
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object *d;
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char **e;
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d = newdictobject();
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if (d == NULL)
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return NULL;
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if (environ == NULL)
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return d;
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/* XXX This part ignores errors */
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for (e = environ; *e != NULL; e++) {
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object *v;
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char *p = strchr(*e, '=');
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if (p == NULL)
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continue;
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v = newstringobject(p+1);
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if (v == NULL)
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continue;
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*p = '\0';
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(void) dictinsert(d, *e, v);
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*p = '=';
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DECREF(v);
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}
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return d;
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}
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static object *PosixError; /* Exception posix.error */
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/* Set a POSIX-specific error from errno, and return NULL */
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static object *
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posix_error()
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{
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return err_errno(PosixError);
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}
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/* POSIX generic methods */
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static object *
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posix_1str(args, func)
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object *args;
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int (*func) FPROTO((const char *));
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{
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object *path1;
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if (!getstrarg(args, &path1))
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return NULL;
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if ((*func)(getstringvalue(path1)) < 0)
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return posix_error();
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INCREF(None);
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return None;
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}
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static object *
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posix_2str(args, func)
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object *args;
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int (*func) FPROTO((const char *, const char *));
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{
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object *path1, *path2;
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if (!getstrstrarg(args, &path1, &path2))
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return NULL;
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if ((*func)(getstringvalue(path1), getstringvalue(path2)) < 0)
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return posix_error();
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INCREF(None);
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return None;
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}
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static object *
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posix_strint(args, func)
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object *args;
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int (*func) FPROTO((const char *, int));
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{
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object *path1;
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int i;
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if (!getstrintarg(args, &path1, &i))
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return NULL;
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if ((*func)(getstringvalue(path1), i) < 0)
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return posix_error();
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INCREF(None);
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return None;
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}
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static object *
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posix_do_stat(self, args, statfunc)
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object *self;
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object *args;
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int (*statfunc) FPROTO((const char *, struct stat *));
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{
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struct stat st;
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object *path;
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object *v;
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if (!getstrarg(args, &path))
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return NULL;
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if ((*statfunc)(getstringvalue(path), &st) != 0)
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return posix_error();
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v = newtupleobject(10);
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if (v == NULL)
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return NULL;
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#define SET(i, st_member) settupleitem(v, i, newintobject((long)st.st_member))
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SET(0, st_mode);
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SET(1, st_ino);
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SET(2, st_dev);
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SET(3, st_nlink);
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SET(4, st_uid);
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SET(5, st_gid);
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SET(6, st_size);
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SET(7, st_atime);
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SET(8, st_mtime);
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SET(9, st_ctime);
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#undef SET
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if (err_occurred()) {
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DECREF(v);
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return NULL;
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}
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return v;
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}
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/* POSIX methods */
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static object *
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posix_chdir(self, args)
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object *self;
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object *args;
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{
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extern int chdir PROTO((const char *));
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return posix_1str(args, chdir);
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}
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static object *
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posix_chmod(self, args)
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object *self;
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object *args;
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{
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extern int chmod PROTO((const char *, mode_t));
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return posix_strint(args, chmod);
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}
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static object *
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posix_getcwd(self, args)
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object *self;
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object *args;
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{
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char buf[1026];
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extern char *getcwd PROTO((char *, int));
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if (!getnoarg(args))
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return NULL;
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if (getcwd(buf, sizeof buf) == NULL)
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return posix_error();
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return newstringobject(buf);
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}
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static object *
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posix_link(self, args)
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object *self;
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object *args;
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{
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extern int link PROTO((const char *, const char *));
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return posix_2str(args, link);
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}
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static object *
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posix_listdir(self, args)
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object *self;
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object *args;
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{
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object *name, *d, *v;
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DIR *dirp;
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struct direct *ep;
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if (!getstrarg(args, &name))
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return NULL;
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if ((dirp = opendir(getstringvalue(name))) == NULL)
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return posix_error();
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if ((d = newlistobject(0)) == NULL) {
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closedir(dirp);
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return NULL;
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}
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while ((ep = readdir(dirp)) != NULL) {
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v = newstringobject(ep->d_name);
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if (v == NULL) {
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DECREF(d);
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d = NULL;
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break;
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}
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if (addlistitem(d, v) != 0) {
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DECREF(v);
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DECREF(d);
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d = NULL;
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break;
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}
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DECREF(v);
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}
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closedir(dirp);
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return d;
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}
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static object *
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posix_mkdir(self, args)
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object *self;
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object *args;
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{
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extern int mkdir PROTO((const char *, mode_t));
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return posix_strint(args, mkdir);
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}
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static object *
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posix_rename(self, args)
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object *self;
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object *args;
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{
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extern int rename PROTO((const char *, const char *));
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return posix_2str(args, rename);
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}
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static object *
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posix_rmdir(self, args)
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object *self;
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object *args;
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{
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extern int rmdir PROTO((const char *));
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return posix_1str(args, rmdir);
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}
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static object *
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posix_stat(self, args)
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object *self;
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object *args;
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{
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extern int stat PROTO((const char *, struct stat *));
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return posix_do_stat(self, args, stat);
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}
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static object *
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posix_system(self, args)
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object *self;
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object *args;
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{
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object *command;
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int sts;
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if (!getstrarg(args, &command))
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return NULL;
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sts = system(getstringvalue(command));
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return newintobject((long)sts);
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}
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static object *
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posix_umask(self, args)
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object *self;
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object *args;
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{
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int i;
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if (!getintarg(args, &i))
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return NULL;
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i = umask(i);
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if (i < 0)
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return posix_error();
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return newintobject((long)i);
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}
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static object *
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posix_unlink(self, args)
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object *self;
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object *args;
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{
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extern int unlink PROTO((const char *));
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return posix_1str(args, unlink);
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}
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static object *
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posix_utimes(self, args)
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object *self;
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object *args;
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{
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object *path;
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struct timeval tv[2];
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if (args == NULL || !is_tupleobject(args) || gettuplesize(args) != 2) {
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err_badarg();
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return NULL;
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}
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if (!getstrarg(gettupleitem(args, 0), &path) ||
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!getlonglongargs(gettupleitem(args, 1),
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&tv[0].tv_sec, &tv[1].tv_sec))
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return NULL;
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tv[0].tv_usec = tv[1].tv_usec = 0;
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if (utimes(getstringvalue(path), tv) < 0)
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return posix_error();
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INCREF(None);
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return None;
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}
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#ifndef NO_LSTAT
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static object *
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posix_lstat(self, args)
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object *self;
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object *args;
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{
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extern int lstat PROTO((const char *, struct stat *));
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return posix_do_stat(self, args, lstat);
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}
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static object *
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posix_readlink(self, args)
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object *self;
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object *args;
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{
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char buf[1024]; /* XXX Should use MAXPATHLEN */
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object *path;
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int n;
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if (!getstrarg(args, &path))
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return NULL;
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n = readlink(getstringvalue(path), buf, sizeof buf);
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if (n < 0)
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return posix_error();
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return newsizedstringobject(buf, n);
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}
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static object *
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posix_symlink(self, args)
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object *self;
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object *args;
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{
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extern int symlink PROTO((const char *, const char *));
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return posix_2str(args, symlink);
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}
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#endif /* NO_LSTAT */
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static struct methodlist posix_methods[] = {
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{"chdir", posix_chdir},
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{"chmod", posix_chmod},
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{"getcwd", posix_getcwd},
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{"link", posix_link},
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{"listdir", posix_listdir},
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{"mkdir", posix_mkdir},
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{"rename", posix_rename},
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{"rmdir", posix_rmdir},
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{"stat", posix_stat},
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{"system", posix_system},
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{"umask", posix_umask},
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{"unlink", posix_unlink},
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{"utimes", posix_utimes},
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#ifndef NO_LSTAT
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{"lstat", posix_lstat},
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{"readlink", posix_readlink},
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{"symlink", posix_symlink},
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#endif
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{NULL, NULL} /* Sentinel */
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};
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void
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initposix()
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{
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object *m, *d, *v;
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m = initmodule("posix", posix_methods);
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d = getmoduledict(m);
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/* Initialize posix.environ dictionary */
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v = convertenviron();
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if (v == NULL || dictinsert(d, "environ", v) != 0)
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fatal("can't define posix.environ");
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DECREF(v);
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/* Initialize posix.error exception */
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PosixError = newstringobject("posix.error");
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if (PosixError == NULL || dictinsert(d, "error", PosixError) != 0)
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fatal("can't define posix.error");
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}
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